@Dimo-Ninov, which TriggerCMD skill are you using? Both the TriggerCMD and Trigger Command, require the "Alexa, ask Trigger CMD to....."
The Triggercmd Smart Home skill does not. You simply say "Alexa, turn on(off) ...."
Russ created a forth skill called TC to simplify things but the original TriggerCMD and Trigger Command still remain in the Alexa skills list.